Endogenous tripeptide antioxidant
Glutathione
Supplement / cosmetic
Written by pep4U Editorial Team · Last reviewed October 12, 2026
The body's major intracellular antioxidant, also taken as a supplement or IV/injectable for antioxidant and skin-lightening purposes.
Go deeper. We have a full, in-depth research deep dive on this compound.
Read it → | Class / type | Endogenous tripeptide antioxidant |
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| Category | Healing, Recovery & Immune |
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| Status (Jul 2026) | Supplement / cosmetic |
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How it works
Neutralizes reactive oxygen species and supports detoxification; for skin lightening, inhibits tyrosinase and shifts melanin toward lighter pheomelanin.
Known / used for
Antioxidant/detox support, skin brightening, 'wellness' IV therapy.
Positives
Well-established antioxidant biology; some RCTs support modest skin-lightening from oral/topical forms; generally safe orally/topically.
Negatives & risks
No proven efficacy for IV skin-whitening; not FDA-approved cosmetically; FDA warned against injectables from supplement-grade material (endotoxin/adverse events); IV risks: liver injury, allergy. In Aug 2026 a compounding pharmacy voluntarily recalled several lots of compounded glutathione injection over elevated endotoxin levels, with adverse reactions reported - a real-world example of this contamination risk.
What people like most (reported community sentiment - not endorsement)
Skin brightening/even tone and a general 'detox'/energy feeling (IV benefits anecdotal).
Frequently asked questions
What is Glutathione?
The body's major intracellular antioxidant, also taken as a supplement or IV/injectable for antioxidant and skin-lightening purposes. Neutralizes reactive oxygen species and supports detoxification; for skin lightening, inhibits tyrosinase and shifts melanin toward lighter pheomelanin.
What is Glutathione used or researched for?
Antioxidant/detox support, skin brightening, 'wellness' IV therapy.
Is Glutathione FDA-approved or legal?
Legal as oral supplement and in cosmetics; NOT FDA-approved for injectable/skin-whitening use; IV form flagged for safety/contamination.
What are the main risks or downsides of Glutathione?
No proven efficacy for IV skin-whitening; not FDA-approved cosmetically; FDA warned against injectables from supplement-grade material (endotoxin/adverse events); IV risks: liver injury, allergy. In Aug 2026 a compounding pharmacy voluntarily recalled several lots of compounded glutathione injection over elevated endotoxin levels, with adverse reactions reported - a real-world example of this contamination risk.
Legal / regulatory status
Legal as oral supplement and in cosmetics; NOT FDA-approved for injectable/skin-whitening use; IV form flagged for safety/contamination.
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